text: /*
   * Copyright (c) 2004-2008 The Trustees of Indiana University and Indiana
   *                         University Research and Technology
   *                         Corporation.  All rights reserved.
   * Copyright (c) 2004-2005 The University of Tennessee and The University
   *                         of Tennessee Research Foundation.  All rights
   *                         reserved.
   * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
   *                         University of Stuttgart.  All rights reserved.
   * Copyright (c) 2004-2005 The Regents of the University of California.
   *                         All rights reserved.
   * Copyright (c) 2016-2020 Intel, Inc.  All rights reserved.
   * Copyright (c) 2020      Research Organization for Information Science
   *                         and Technology (RIST).  All rights reserved.
   * $COPYRIGHT$
   *
   * Additional copyrights may follow
   *
   * $HEADER$
   */
  
  #include "src/include/pmix_config.h"
  #include "include/pmix_common.h"
  
  #include <string.h>
  
  #include "src/mca/mca.h"
  #include "src/mca/base/base.h"
  
  #include "src/mca/prm/base/base.h"
  
  /* Function for selecting a prioritized list of components
   * from all those that are available. */
  int pmix_prm_base_select(void)
  {
      pmix_mca_base_component_list_item_t *cli = NULL;
      pmix_mca_base_component_t *component = NULL;
      pmix_mca_base_module_t *module = NULL;
      pmix_prm_module_t *nmodule;
      pmix_prm_base_active_module_t *newmodule, *mod;
      int rc, priority;
      bool inserted;
  
      if (pmix_prm_globals.selected) {
          /* ensure we don't do this twice */
          return PMIX_SUCCESS;
      }
      pmix_prm_globals.selected = true;
  
      /* Query all available components and ask if they have a module */
      PMIX_LIST_FOREACH(cli, &pmix_prm_base_framework.framework_components, pmix_mca_base_component_list_item_t) {
          component = (pmix_mca_base_component_t *) cli->cli_component;
  
          pmix_output_verbose(5, pmix_prm_base_framework.framework_output,
                              "mca:prm:select: checking available component %s", component->pmix_mca_component_name);
  
          /* If there's no query function, skip it */
          if (NULL == component->pmix_mca_query_component) {
              pmix_output_verbose(5, pmix_prm_base_framework.framework_output,
                                  "mca:prm:select: Skipping component [%s]. It does not implement a query function",
                                  component->pmix_mca_component_name );
              continue;
          }
  
          /* Query the component */
          pmix_output_verbose(5, pmix_prm_base_framework.framework_output,
                              "mca:prm:select: Querying component [%s]",
                              component->pmix_mca_component_name);
          rc = component->pmix_mca_query_component(&module, &priority);
  
          /* If no module was returned, then skip component */
          if (PMIX_SUCCESS != rc || NULL == module) {
              pmix_output_verbose(5, pmix_prm_base_framework.framework_output,
                                  "mca:prm:select: Skipping component [%s]. Query failed to return a module",
                                  component->pmix_mca_component_name );
              continue;
          }
  
          /* If we got a module, keep it */
          nmodule = (pmix_prm_module_t*) module;
          /* let it initialize */
          if (NULL != nmodule->init && PMIX_SUCCESS != nmodule->init()) {
              continue;
          }
          /* add to the list of selected modules */
          newmodule = PMIX_NEW(pmix_prm_base_active_module_t);
          newmodule->pri = priority;
          newmodule->module = nmodule;
          newmodule->component = (pmix_prm_base_component_t*)cli->cli_component;
  
          /* maintain priority order */
          inserted = false;
          PMIX_LIST_FOREACH(mod, &pmix_prm_globals.actives, pmix_prm_base_active_module_t) {
              if (priority > mod->pri) {
                  pmix_list_insert_pos(&pmix_prm_globals.actives,
                                       (pmix_list_item_t*)mod, &newmodule->super);
                  inserted = true;
                  break;
              }
          }
          if (!inserted) {
              /* must be lowest priority - add to end */
              pmix_list_append(&pmix_prm_globals.actives, &newmodule->super);
          }
      }
  
      if (4 < pmix_output_get_verbosity(pmix_prm_base_framework.framework_output)) {
          pmix_output(0, "Final prm priorities");
          /* show the prioritized list */
          PMIX_LIST_FOREACH(mod, &pmix_prm_globals.actives, pmix_prm_base_active_module_t) {
              pmix_output(0, "\tprm: %s Priority: %d", mod->component->base.pmix_mca_component_name, mod->pri);
          }
      }
  
      return PMIX_SUCCESS;;
  }
  